305 tbi to 350 tbi swap

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willy

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Ok, so I have a 1995 chevy k1500 with a 305 tbi/ 4l60e, and I would like to swap in a 350 tbi. Upon doing research, I find that there isn't a straight answer on what is needed for the swap. I know that I'll need the 350 throttle body and injectors, but anything beyond that is where I'm lost. Some say I need a 350 computer and knock sensor, and some say that the 305 one will run fine. So my question, is what will I need to get in order to do the swap.

If anyone can provide a link to a clear answer, that would be much appreciated also.
 

1995sierraz71

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I have personally done the swap from 305-350 in my 95 k1500. You are correct on injectors. If the throttle body sensors (tps etc.) are different, swap whole tb, but generally just the injectors/pod. The 305 computer/chip will run a 350. BUT...I have found it runs pretty rich especially at idle, but I ran that for a while with no noticeable issue.
 

willy

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I have personally done the swap from 305-350 in my 95 k1500. You are correct on injectors. If the throttle body sensors (tps etc.) are different, swap whole tb, but generally just the injectors/pod. The 305 computer/chip will run a 350. BUT...I have found it runs pretty rich especially at idle, but I ran that for a while with no noticeable issue.

Ok, that's good to hear, thanks for the info
 
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